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(No Model.) 2 Sheets-Sheet 1. ,J. H. WEST. AUTOMATIC APPARATUS FOR TELEPHONE SWITUHBOARDS.

No. 605,659. Patented June 14,1898.

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UNITED STATES l PATENT Fries.

JULIUS HENRIK WEST, on BERLIN, GERMANY.

, AUTOMATIC APPARATUS FOR TELEPHONE-SWITCHBOARDS.

SPECIFICATION forming part of LettersPatent No. 605,659, dated June 14, 1898.

' Amara 1118a July a ra e.- Serial No. 598,446. (No model.)

T 00% whom it may concern: Be it knownthat I, JULIUS HENRIK Wnsr,

, a subject of the King of Denmark, residing at Berlin, in theGerman Empire, have invented certain new. anduseful Improvements in Automatic Apparatus for'the WVorking of Tele phone-Stations; and I do hereby declare the Y following to be a full, clear, and exact descrip tion of the invention,su ch;as will enable others skilled in the art to which it appertains to make and use the same. I This invention has for its obj ect-the simplification of the working of telephone-stations; and it consists in carrying out by automatic apparatus several of the operations that have hitherto been effected by hand and which are repeated in making each connection, such automatic apparatusbeing brought intoaction on effecting a certain manipulation and being then'made to effect a number of subsequent operations in the required order.

I will describe the said invention with reference 'to the accompanying diagrammatic drawings, in which- Figure 1 is a diagrammatic view of a tele phone system embodying my invention. Fig:

' v 2 is a similar view of the automatic appara-v tus for facilitating the operation of the system. Fig; 3 is a perspective view of the auto matic switch.

Referring more particularly to'the drawings and letters and figures of reference thereon, Fig. 1 shows at the left hand two subscribers lines T T running through three switchboards of a station, and at the right hand a glow-lamp board G T, the several lamps g g of which serve to give a visible indicationof free or engaged. This is efiecte'd in such manner that the circuit of a glow-lamp is closed bothby the falling of the indicator-shutter as alsobythe plugging of a jack of the same number, so that'the glow-lamp is'lighted-up as long as the said line is engaged.

Fig. 2 shows at the right hand the speaking instrument of the operator (microphone M, telephone T, induction-coil, and microphonebattery) and the call-bell battery W B, the continuous current of which is changed to an alternate current bymeans of the polechanger P W if the subscribers have polarized call-bells. To the left hand are two plugs S and S of an ordinary double-cord connection, set with an intermediate ring-off drop S K, and in the middle is the before-mentioned automatic switch device,-which will be presently explained.

When a subscriberfor instance, Tcalls, his indicator-shutter K falls at the switchboard I' of the station and bears against the contact-wire d. A currentthen passes from the glow-lamp batteryB through the switchlever H, which ordinarily is situated on the contact 2 of the switch apparatus U, and through the glow-lamp board G T, lamp 9, contact-wire d, shutter K, and back to the battery. As soon as the shutter K falls the operator at switchboard I raises the rear plug S. of one of his double cords and inserts it into the jack 7c of his board. The two springs f and f of the jack 7.: are thus connected together by means of the insulated ring 1' of the plug, and as f is connected with the glow-lamp and f with the battery 13 a sec- 0nd circuit for the current passing through. the glow-lamp is thus formed. The latter therefore continues to glow if the operator now raises the fallen shutter K again. The speaking instrument of the operator is now connected, as seen on the drawings, with the double-wire line of the subscriber T through c H t", end 8 of the plug S, and

through 0 H 2 70 and jack in as the body is of S makes contact with the socket h of k, and the end 8 bears against the spring f so as to separate it from f so that K is cut out of circuit. The operator then announces, fHere, exchange, whereupon the subscriber l gives the number of the required subscriber, the fact whether the corresponding line issuch as No. 2. The operator then looks past his switchboard to the glow-lamp board, situated some feet away, in order to ascertain whether the line T is free or not. He then answers"free or .7engaged] as the case may be. If it is free, he raises his front plug S and inserts it into the jack k of the subscriber. No. 2, whereby the glow-lamp g is lit up, as before described. On the raising of S the levers H H pivoted upon the axis a, and with them the levers H H, mounted on H but insulated therefrom and from each other by insulation 1, turn under the influence of the springs 7; t in the direction of a clock hand until the pin Z bears against the disk s This latter is fixed to the disk 5 and both are mounted frictionally upon the axis a which is continuously rotated by a motor, (indicated by a belt (CK) As soon as Z moves downward the abutment 0 will be free, and the two disks in following the motion of the axis a can rotate in the direction of the arrow. As long as Z bears against 5' neither of the springs i and i" touch their contacts 0 and 0 The parts .9 and 7a of plug S will be connected with call-battery IV 13 while disk 3 is rotating, except when notch s in the periphery of said disk allows the insulating projection s to drop toward axis (0, allowing springs 7L 7L2 to draw springs 71, ha away from contacts 0 0, breaking connection to the callbattery. During the rest of rotation of disk 8 springs 7L 7L2 will be pressed to the right, allowing opening springs 7r h to rest against contacts 0 c, connected to the call-battery, whereby the call-battery will be connected into any line in whose spring-jack plug S is inserted.

s is a metal piece which electrically connects springs 7L and 7L2.

Shortly after the insulatingpiece on 7L2 again engages with the notch s of the disk '3 the pin Z falls into the notch c of disk 8, and thus stops disks s and s which, as before stated, are held frictionally, for example, by a friction-disk 5, bearing against disk 5-. In addition this motion of Z-that is, of II II" lIcauses the correspondingcontact-springs 7: and i to bear against their cont-act O and C whereby the two plugs are connected directly with each other through the ring-elf drop S K, thus completing the connection. \Vhen the conversation is finished, the two subscribers ring elf, when the shutter S K will fall. The operator then draws the plugs opposite the ring-off drop out of the jacks, whereby the glow-lamps g and g are extinguished. The front plug S falls on the lever II and turns it, and also the levers II II II, back into the position shown in Fig. 2, so that the disks s and s can turn a small distance farther until the abutment 0 bears against the pin Z, whereby they are stopped again.

For night working a call-bell \V is provided, which, as shown, is put in circuit on bringing lever II upon the contact 3.

Having now particularly described and ascertained the nature of this invention and in what manner the same is to be performed, I declare that what I claim is 1. The combination of telephone -lincs,

spring-jacks to which the lines are connected,

switch-plugs, connecting-wires therefor, a switch operated in one direction by a spring and in the opposite direction by the weight of one of said plugs, an operators telephone normally connected between said plugs by said switch and disconnected when the switch is operated on the lifting of the plug, an automatic switch adapted to connect a signalgenerator between the plugs, and a detent for said automatic switch directly controlled by the weight of the plug which controls said first-mentioned switch.

2. In a telephone system the combination with the subscribers lines and their respective jacks and plugs, of an automatic switch or contact-making apparatus comprising a eontinuously-rotating shaft, a disk or disks held frictionally thereon and having a camsurface and stops, and means for holding said disk from rotation comprising the lovers ll 11 contacts carried by said levers, and (3011' tacts actuated by said cam-surface.

The combination of plugs f S connecting-wires therefor, an automatic switch between said plugs comprising a driving-shaft with a cam-disk frictionally mounted thereon, a pivoted stop-lever II normally held in position to stop the cam-disk by the weight of one of the plugs acting thereon, contacts ll" II normally in connection with plugs S S and also with the operators telephone, contacts II II being connected to lever II so as to move therewith, thereby breaking connection with the operators telephone, and switcheontacts controlled by the cam-disks for connecting and disconnecting a signal-generator to and from the plugs, as described.

4. An automatic switch apparatus for telephone-exchanges consisting of the combina tion with the plug or connection-cords, the operators telephone and the call-battery, of a number of contacts inserted in the said eonnecting-cords, a shaft continuously rotated by a suitable motor, disks loosely mounted on said shaft and having suitable cam-surfaces, means forcoupling said disks with said shaft automatically by the action of lifting up the connectioirplug, and means for operating said contacts by the rotation of the said disks, substantially as and for the purpose set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

JULIUS lllCNltIK \YICS'J.

\Vi tnesses:

MAX. WA orznu, E. KomJNnn. 

